Universal joint.



No. 699,180. 7 Patented may 6, I902. J.JETTEB.

UNIVERSAL JOINT.

(Application filed July 15, 1901.) (No Model.)

UNITED STATES PATENT (Enrica.

JULIUS J ETTER, OF WVINCHESTER, MASSACHUSETTS.

- UNIVERSAL JOINT.

, srncnsxoanon forming m of Letters Patent No. 699,180, dated May6,1902.

Application filed July 15, 1901- Serial No. 68,433. (No model.:

T0 at whom it may concern: 7

Be it known that I, JULIUS JETTER, a citizen of the United States,residing at Winchester,

in the county of Middlesex and'State of Massachusetts, have inventedcertain new and usefulImprovementsin Universal Joints; and I do-herebydeclare the following to bea full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The present invention relates to universal 'joints of "the typecomprisingsuitablecoupling -heads and an interposed connectingblockpivotally secured to the coupling-heads.

The object. of my invention isto provide a universal joint of the typereferred to of improved construction, particularly as to themeans forpivotally securing the connecting- V will be apparent to those skilledin; the

block to the coupling-heads.

With this object in view my invention consists in the universal jointhereinafter described and claimed, the advantages of which art from thefollowing description. My invention will be clearly understood from theaccompanying'drawings, in which is illustrated a universal jointembodying my invention in its preferred form. 5 In said drawings, Figure1 is a view in side elevation of the universal joint and the ends of theshafts connected thereby. Fig. 2is a view in longitudinal section on theline 2 2 of Fig. 1, the shafts being omitted; and Fig. 3 is a view incross-section on the line 3 3 of Fig. 2. 1 and 2 represent thecoupling-heads of any suitable construction, secured to or formed in-ltegral with the shafts 3 and 4. Between the forked ends of thecoupling-heads is'interposed the connecting-block 5, which is pivotallysecured to the coupling-heads. For pivotally securing theconnecting-block to the coupling-heads my invention contemplates the useof screws passing through the forked ends of the coupling-heads andscrewing into the block, and in order to prevent these screws fromworking loose my invention contemplates the use of a pin arranged toengage the screws,so as to prevent rotation thereof. the drawings at 6,7, 8, and 9, and, as shown, are provided with conical ends, whichcontact at the center of the block. The pin for These screws areindicated in preventing rotation of the screws is indicated at 10 andextends through a hole in block 5at right angles 'to theplane in whichthe screws 6, 7, 8, and 9 are located and engages grooves formed in theends of the screws. To allow the pin 10 to be readily inserted, itpreferably has a driving fit in the hole in the block 5, but may bescrew-threaded or secured therein in any other suitable manner, ifdesired. The block-5 is preferably rectangular in cross-section and hasa sufficient extent of surface in contact with the inner surfaces of theforks of the con pling-heads to relieve the pivot-screws ofsubstantially all strain.

The joint above described is of simple and inexpensive construction andis reliable and efficient in operation. While the various parts maybefinish ed before being assembled, a convenient method of manufacture isto secure the connecting-block to the couplingheads by means of thescrews and thereafter form the hole in the block to receive the pin 10and the grooves in the ends of the screws by means of a drill, or thegrooves in the ends of the screws may be formed by a drill insertedthroughthe hole previously formed in the block which receives the pin10.

Having thus described my invention, I claim as new and desire to secureby Letters Patent of the United States- 1. A universal joint, having, incombination, coupling-heads, a block interposed between thecoupling-heads, screws pivotally connecting the block with the heads,and a .pin arranged to engage the screws and prevent, rotation thereof,substantially scribed.

as deuniversal joint, having, in combination, coupling-heads, a blockinterposed between the coupling heads, conical ended screws pivotallyconnecting the block with the heads, and a pin arranged to engage theends of the screws and prevent rotation thereof, substantially asdescribed.

3. A universal joint, having, in combination, coupling-heads, a blockinterposed between the coupling-heads, four screws provicled withgrooved ends pivotally connecting the block with the heads, and a pinarranged to engage the grooves in the ends of the screws and preventrotation thereof, substantially as described.-

4. A universal joint, having, in coinbina- I are located arranged toengage the grooves IO tion, forked coupling-heads, a block interin theends of the screws and prevent rota- .posed between the coupling-headsprovided tion thereof, substantially as described.

with surfaces engaging the inner surfaces of In testimony whereof Iaflix my signature the forks of the coupling-heads, four screws inpresence of two witnesses.

provided with grooved ends pivotally con- JULIUS JETTER. meeting theblock with the heads and a pin Witnesses: having a driving fit in a holein the block at ELLA F. BUTMAN,

right angles to the plane in which the screws ROSALIE JETTER.

